[PATCH] Add _FORTIFY_SOURCE implementation documentation [BZ #28998]

[Sam James]

> On 22 Dec 2022, at 12:56, Siddhesh Poyarekar <siddhesh@gotplt.org> wrote:
> 
> Ping!  Any further comments other than the redundant 'See' Andreas noted?
> 

It looks good & thanks for doing it.

I wonder if it's worth noting (maybe it's obvious) that tools which
make use of LD_PRELOAD may need to provide their own wrappers.

(umockdev being an example I'm thinking of here.)

> Thanks,
> Sid

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